CN214176791U

CN214176791U - Novel grounding protection box

Info

Publication number: CN214176791U
Application number: CN202023216630.2U
Authority: CN
Inventors: 陈德清; 孟平; 邹嘉运
Original assignee: Zhuhai Hyde Nonferrous Metal New Material Technology Co ltd
Current assignee: Zhuhai Hyde Nonferrous Metal New Material Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-10
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a novel grounding protection box, which comprises a sealing box body, a bus bar, a wiring terminal component and an inlet wire sealing structure; the bus board and the wiring terminal assembly are fixedly arranged in the internal sealed cavity of the sealed box body; the wiring terminal assembly comprises a double-pass sleeve, a contact and a tightening sleeve; the bi-pass sleeve is mounted on the bracket in an insulating manner, one end of the bi-pass sleeve is communicated with the bus board, the other end of the bi-pass sleeve is in threaded connection with the tightening sleeve, the contact is sleeved in the tightening sleeve, and a cable conductor through hole is formed in the contact; the cable that inserts is by the inlet wire seal structure is sealed. The utility model has more scientific and reasonable structural design and layout, and adopts the cable conductor to be inserted into the connecting terminal, thereby increasing the contact area and the contact pressure of the conductor and improving the electric conduction energy of the conductor; the wiring mode is simple convenient, and the shrink cover of screwing can contract to sticis after the wire stripping inserts, guarantees cable and binding post's effective contact, connects firmly.

Description

Novel grounding protection box

Technical Field

The utility model relates to a high pressure transmission and transformation circuit power cable ground protection product technical field, concretely relates to novel ground protection case.

Background

The grounding protection box is a grounding protection device of a power cable, and the existing power cable metal sheath protection box (as shown in fig. 1) is of a structure with an exposed grounding end, the grounding end is directly exposed outside the box body, and a grounding cable terminal in a severe environment is corroded and polluted to cause poor conduction and reduction of a drainage effect and performance, so that accidents such as heating, combustion and explosion of equipment are caused. On the other hand, current ground protection case wiring end adopts double-layered line formula mode of connection more, see figure 1, the drainage copper tablet passes through fastener and reconnection metal sheath protective layer protector and cylinder manifold behind the cable junction, form protection circuit, this wiring mode structure is complicated, high in manufacturing cost, locking mechanism adopts 8mm bolt to act on the briquetting and the impetus is at the cable core, smooth silk and not hard up phenomenon appear in the use, cause contact failure, system contact resistance increases and arouses to generate heat, the ablation, accidents such as explosion, specifically do:

the structure is loose, the strength of the locking component (influenced by design thought and overall structure, the specification of the bolt is small, the locking is limited), and the stability (the compression bolt is easy to slip teeth) is poor; the contact sectional area of the conductor is insufficient (more than 1; less than 2; no stable margin of 3 times), so that poor conductivity causes adverse effects on drainage and pressure relief;

in the structure, conductors, bolts, copper bars, wire clamps and other different metal materials are lapped, converted and transited for up to 7 times, so that faults such as interface resistance, system contact resistance increase, heating, ablation and the like are generated, the drainage effect and performance are reduced, and accidents such as heating, combustion and explosion of equipment are caused;

the structural influence of the system conductor causes that the insulation safety distance margin between phases and to the ground (equipment shell) is limited, and the sharp edges and sharp corners of the components are too much, so that the adverse influence on the electric power safety operation, such as the occurrence of phase-to-phase short circuit and ground discharge flashover in the operation of the equipment, is caused.

Disclosure of Invention

The utility model provides a novel ground protection case to the problem that above-mentioned exists. The utility model discloses a realize above-mentioned purpose, take following technical scheme to realize:

a novel grounding protection box comprises a sealing box body, a junction plate, a wiring terminal assembly and an inlet wire sealing structure; the bus board and the wiring terminal assembly are fixedly arranged in the internal sealed cavity of the sealed box body; the wiring terminal assembly comprises a double-pass sleeve, a contact and a tightening sleeve; the bi-pass sleeve is mounted on the bracket in an insulating manner, one end of the bi-pass sleeve is communicated with the bus board, the other end of the bi-pass sleeve is in threaded connection with the tightening sleeve, the contact is sleeved in the tightening sleeve, and a cable conductor through hole is formed in the contact; the wiring terminal assembly comprises four groups of three-phase ends and grounding ends, and is respectively connected with a three-phase cable and a grounding cable; the cable that inserts is by the inlet wire seal structure is sealed.

As a further explanation of the present invention, the cable core groove has been seted up to the bi-pass sleeve lower extreme, when the wiring terminal subassembly equipment was worked a telephone switchboard, the cable core conductor of cable passed the contact is inserted in the cable core groove.

Furthermore, the contact is conical contact, tighten up the cover and contain a conical trepanning, tighten up the cover and cover the contact and with when the bi-pass sleeve pipe connects soon, through screwing tighten up the cover can form right the tightening action of contact.

Furthermore, the sealing box further comprises a climbing device, and the climbing device is arranged between the tightening sleeve and the inner side wall of the sealing box body.

Furthermore, the climbing device is made of insulating silica gel.

Furthermore, a metal protective layer protector is arranged between the bus board and the three-phase end to form an overcurrent and overvoltage protection structure, so that the performance of the grounding built-in sealed grounding protection box is improved.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the structure design and the layout of the utility model are more scientific and reasonable, and the cable conductor is inserted into the connecting terminal, so that the contact area and the contact pressure of the conductor are increased, and the electric conduction energy of the conductor is improved; the wiring mode is simple and convenient, the wire can be contracted and compressed by screwing the contraction sleeve after being inserted into the wire stripping, the effective contact between the cable and the wiring terminal is ensured, and the connection is firm; the terminal is connected with the metal protective layer protector (an overcurrent and voltage protector) through the two-way sleeve by adopting a conical sleeve opening petal and external nut locking mode, and is safe and stable.

Drawings

FIG. 1 is a schematic diagram of a conventional grounding protection box and a wire clamping structure;

FIG. 2 is a schematic diagram of the wire feeding of a conventional grounding protection box;

FIG. 3 is a schematic structural view of the grounding protection box of the present invention;

FIG. 4 is a schematic structural view of the wiring assembly of the present invention;

fig. 5 is a schematic diagram of the wiring of the present invention.

Reference numerals: the device comprises a sealing box body 1, a confluence plate 2, a bi-pass sleeve 3, a contact 4, a tightening sleeve 5 and a climbing device 6.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely illustrative of some, but not all embodiments of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 3, a novel grounding protection box comprises a sealing box body 1, a bus bar 2, a wiring terminal assembly and an inlet wire sealing structure; the bus board 2 and the wiring terminal assembly are fixedly arranged in an internal sealed cavity of the sealed box body 1; the wiring terminal assembly comprises a double-pass sleeve 3, a contact 4 and a tightening sleeve 5; the bi-pass sleeve 3 is mounted on the bracket in an insulating manner, one end of the bi-pass sleeve is communicated with the bus board 2, the other end of the bi-pass sleeve is in threaded connection with the tightening sleeve 5, the contact 4 is sleeved in the tightening sleeve 5, and a cable conductor through hole is formed in the interior of the bi-pass sleeve; the wiring terminal assembly comprises four groups of three-phase ends and grounding ends, and is respectively connected with a three-phase cable and a grounding cable; the cable that inserts is by the inlet wire seal structure is sealed. Referring to fig. 5, the wiring process of the novel grounding protection box of the embodiment is as follows: after a cable is stripped by a certain length of a cable core conductor, the cable core conductor is inserted into the sealing box body 1, the cable core conductor penetrates through the contact 4 and the tightening sleeve 5 to be connected with the lower end of the bi-pass sleeve 3, and the tightening sleeve 5 is screwed, so that the cable core conductor and the bi-pass sleeve 3 are reliably connected, and the contact performance is improved. By adopting the connection structure of the embodiment, the contact area of the cable core conductor and the bi-pass sleeve 3 can be larger than 5 times of the area of the cable conductor, so that the defect of wire clamping type wiring is avoided, and the conductivity is effectively improved.

Referring to fig. 3-5, the two-way sleeve 3 is provided with a core groove at the lower end thereof, and when the terminal assembly is assembled for connection, a core conductor of a cable is inserted into the core groove through the contact 4 to make contact with the two-way sleeve 3.

As shown in the accompanying drawings, in the present embodiment, the contact 4 is a conical contact, and accordingly, the tightening sleeve 5 includes a conical sleeve hole, when the tightening sleeve 5 is sleeved into the contact 4 and screwed with the double-pass sleeve 3, a tightening effect on the contact 4 can be formed by screwing the tightening sleeve 5, so that a cable core conductor in the contact is clamped and tightly contacted with the cable core groove, thereby ensuring reliable connection of the contact.

Referring to the attached drawings, in the embodiment, the creepage-increasing device 6 is further included, and the creepage-increasing device 6 is arranged between the tightening sleeve 5 and the inner side wall of the sealed box body 1 to increase creepage insulation distance; the creepage increasing device 6 is made of insulating silica gel.

As shown in fig. 3, in an embodiment of the present invention, a metal sheath protector is further disposed between the bus board 2 and the three-phase terminal, so as to form an over-current and over-voltage protection structure, thereby improving the performance of the grounding built-in sealed grounding protection box.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications described in the claims and the specification of the present invention are included in the scope of the present invention. In addition, the abstract and the title are provided for assisting the search of patent documents and are not intended to limit the scope of the present invention.

Claims

1. The utility model provides a novel ground protection case which characterized in that: the junction box comprises a sealed box body, a bus bar, a wiring terminal assembly and an inlet wire sealing structure; the bus board and the wiring terminal assembly are fixedly arranged in the internal sealed cavity of the sealed box body; the wiring terminal assembly comprises a double-pass sleeve, a contact and a tightening sleeve; the bi-pass sleeve is mounted on the bracket in an insulating manner, one end of the bi-pass sleeve is communicated with the bus board, the other end of the bi-pass sleeve is in threaded connection with the tightening sleeve, the contact is sleeved in the tightening sleeve, and a cable conductor through hole is formed in the contact; the wiring terminal assembly comprises four groups of three-phase ends and grounding ends, and is respectively connected with a three-phase cable and a grounding cable; the cable that inserts is by the inlet wire seal structure is sealed.

2. The novel grounding protection box of claim 1, characterized in that: the lower end of the double-pass sleeve is provided with a cable core groove, and when the wiring terminal assembly is used for wiring, a cable core conductor of a cable penetrates through the contact and is inserted into the cable core groove.

3. The novel grounding protection box of claim 1, characterized in that: the contact is conical contact, tighten up the cover and contain a conical trepanning, tighten up the cover and cover the contact and with when the bi-pass sleeve pipe connects soon, through screwing tighten up the cover can form right the tightening action of contact.

4. The novel grounding protection box of claim 1, characterized in that: still include and increase the climber, it sets up between tightening sleeve and sealed box inside wall to increase climber.

5. The novel grounding protection box of claim 4, characterized in that: the climbing device is made of insulating silica gel.

6. The novel grounding protection box of claim 1, characterized in that: and a metal protective layer protector is arranged between the bus board and the three-phase end to form an overcurrent and overvoltage protection structure, so that the performance of the grounding built-in sealed grounding protection box is improved.